<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8" />
    <title>Document</title>
    <script type="text/javascript" src="./code/lib/vue-2.4.0.js"></script>
    <style type="text/css">
        .ball{
            width: 15px;
            height: 15px;
            background-color: #f00;
            border-radius:50%;
        }
    </style>
</head>
<body>

    <div id="app">
        <input type="button" value="快到碗里来" @click="flag=!flag" />

       <transition @before-enter="beforeEnter"
       @enter="Enter"
       @after-enter="afterEnter">
            <div class="ball" v-show="flag"></div>
        </transition>

    </div>

    <script type="text/javascript">
        // 创建 Vue实例，得到 ViewModel
        var vm = new Vue({
            el: '#app',
            data: {
                flag:false
            },
            methods: {
                beforeEnter( el ){
                    el.style.transform='translate(0,0)';
                },
                Enter( el, done ){
                    el.offsetWidth;
                    el.style.transform = 'translate(150px, 450px)';
                    el.style.transition="all 0.8s ease-in-out";
                    done();
                },
                afterEnter( el ){
                    this.flag = !this.flag;
                }
            }
        });
    </script>
</body>
</html>